The Bus Ride

A blonde, a red head and a brunette sign up with a tourist group and chartered a double-decker bus to go to London. There are only 2 seats left on the bottom of the bus and only 1 seat in the top of the bus available when they board. They decided to take turns riding in the top and flipped a coin to see who got the first turn. The blonde won the toss.

A couple of hours later it's the red heads turn so she walks up the stairs, and sees the blonde sitting there scared half to death. She's clutching the seat in front of her so hard that her knuckles are white.

"What's goin' on?" the red head asks. "We're havin' a grand old time down below."